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| Copper and gold in a sulfur-oxygen mixed ore in Laos were recovered by gravity separation-flotation combined process. |
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Received:December 27, 2023
Revised:January 22, 2024
Accepted:February 05, 2024
Published Online:March 24, 2025
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| DOI： |
| KeyWord:sulfur-oxygen mixed ore;copper; gold; gravity separation-flotation combined process; synergistic activation; strengthen the collection |
| Author | Institution |
| Song Changxu |
Faculty of Land Resource Engineering, Kunming University of Science and Technology |
| Ye Guohua |
Faculty of Land Resource Engineering, Kunming University of Science and Technology |
| Kang Xuanxiong |
Faculty of Land Resource Engineering, Kunming University of Science and Technology |
| Zhu Siqin |
Faculty of Land Resource Engineering, Kunming University of Science and Technology |
| Rong Yiyang |
Faculty of Land Resource Engineering, Kunming University of Science and Technology |
| Xiang Xinyue |
Faculty of Land Resource Engineering, Kunming University of Science and Technology |
| Zhang Yun |
Faculty of Land Resource Engineering, Kunming University of Science and Technology |
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| Abstract: |
| The copper grade of a sulfur-oxygen mixed ore in Laos is 1.23%, and the copper oxidation rate is 26.02%. The gold content is 3.03 g/t, and most of them exist in intergranular form and package form. The ore contains 10% Mingjin, which is pre-concentrated by gravity separation. Copper sulfide minerals and other forms of gold minerals account for a large proportion, which is suitable for flotation. Therefore, the gravity-flotation combined process is used to comprehensively recover copper and gold, avoiding the loss of Mingjin. The ideal technical indicators were obtained : the gold grade of the gravity concentrate was as high as 915.50 g/t, and the recovery rate was 12.09% ; under the optimum conditions ( activator using sodium sulfide 1000 g/t + ammonium sulfate 500 g/t, collector using amyl xanthate 60 g/t + ammonium dibutyl dithiophosphate 60 g/t ), the copper grade in the flotation concentrate reaches 27.48%, the operation recovery rate is 91.38%, the gold grade is 59.25 g/t, and the operation recovery rate is 90.93%. The comprehensive recovery of copper and gold is well realized. |
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